U.S. presidents

<onlyinclude>This list includes only those persons who were sworn into office as President of the United States following the ratification of the United States Constitution, which took effect in 1789. For American leaders prior to this ratification, see President of the Continental Congress. The list does not include any Acting Presidents under Amendment XXV of the U.S. Constitution.</onlyinclude>
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The President of the United States of America (sometimes abbreviated as POTUS) is the head of state and head of government of the United States. The president is at the head of the executive branch of the federal government, whose role is to enforce national law as given in the Constitution and written by Congress. Article Two of the Constitution establishes the president as commander-in-chief of the armed forces and enumerates powers specifically granted to the president, including the power to sign into law or veto bills passed by both houses of Congress, to create a Cabinet of advisors, to grant pardons or reprieves, and, with the "advice and consent" of the Senate, to make treaties and appoint federal officers, ambassadors, and federal judges, including Justices of the Supreme Court. As with officials in the other branches of the United States government, the Constitution restrains the president with a set of checks and balances designed to prevent any individual or group from taking absolute power.
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